Practise writing functions with parameters, return values and default arguments.
Review first: Functions
Write a function to_fahrenheit(celsius) that returns the temperature in Fahrenheit. Print the result for 0, 37 and 100.
The formula is celsius * 9 / 5 + 32. Remember to return the value.
def to_fahrenheit(celsius):
return celsius * 9 / 5 + 32
for c in [0, 37, 100]:
print(c, "->", to_fahrenheit(c))0 -> 32.0
37 -> 98.6
100 -> 212.0Write make_greeting(name, greeting="Hello") that returns a string like Hello, Asha!. Call it once with only a name and once with the greeting "Welcome".
Build the string with an f-string and return it; print outside the function.
def make_greeting(name, greeting="Hello"):
return f"{greeting}, {name}!"
print(make_greeting("Asha"))
print(make_greeting("Ravi", "Welcome"))Hello, Asha!
Welcome, Ravi!Write a function longest_word(words) that returns the longest string in a list. If two words are equally long, return the first one.
Keep track of the best word so far and replace it only when you find a strictly longer one.
def longest_word(words):
best = words[0]
for word in words[1:]:
if len(word) > len(best):
best = word
return best
print(longest_word(["sql", "python", "java", "golang"]))python"python" and "golang" both have 6 letters. Because we only replace best when a word is strictly longer, the first one wins. Python's built-in max(words, key=len) behaves the same way.